#
# Copyright (c) 2001, 2002, 2003 Steven Knight
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import sys
import unittest
import string

from SCons.Sig.MD5 import current, collect, signature, to_string, from_string




class my_obj:
    """A dummy object class that satisfies the interface
    requirements of the MD5 class.
    """

    def __init__(self, value = ""):
	self.value = value
        
    def get_signature(self):
        if not hasattr(self, "sig"):
	    self.sig = signature(self)
	return self.sig

    def get_contents(self):
	return self.value



class MD5TestCase(unittest.TestCase):

    def test_current(self):
	"""Test deciding if an object is up-to-date

	Simple comparison of different "signature" values.
	"""
	obj = my_obj('111')
	assert not current(obj.get_signature(), signature(my_obj('110')))
	assert     current(obj.get_signature(), signature(my_obj('111')))
	assert not current(obj.get_signature(), signature(my_obj('112')))

    def test_collect(self):
	"""Test collecting a list of signatures into a new signature value
	"""
        s = map(signature, map(my_obj, ('111', '222', '333')))
        
        assert '698d51a19d8a121ce581499d7b701668' == collect(s[0:1])
        assert '8980c988edc2c78cc43ccb718c06efd5' == collect(s[0:2])
	assert '53fd88c84ff8a285eb6e0a687e55b8c7' == collect(s)

    def test_signature(self):
        """Test generating a signature"""
	o1 = my_obj(value = '111')
        s = signature(o1)
        assert '698d51a19d8a121ce581499d7b701668' == s, s

        o2 = my_obj(value = 222)
        s = signature(o2)
        assert 'bcbe3365e6ac95ea2c0343a2395834dd' == s, s

        try:
            signature('string')
        except AttributeError, e:
            assert string.find(str(e), "unable to fetch contents") == 0, str(e)
        else:
            raise AttributeError, "unexpected get_contents() attribute"

    def test_to_string(self):
        assert '698d51a19d8a121ce581499d7b701668' == to_string('698d51a19d8a121ce581499d7b701668')

    def test_from_string(self):
        assert '698d51a19d8a121ce581499d7b701668' == from_string('698d51a19d8a121ce581499d7b701668')

if __name__ == "__main__":
    suite = unittest.makeSuite(MD5TestCase, 'test_')
    if not unittest.TextTestRunner().run(suite).wasSuccessful():
	sys.exit(1)